Title:
INDIVIDUAL OPERATION DETECTION METHOD OF INVERTER
Document Type and Number:
Japanese Patent JP3213444
Kind Code:
B2
Abstract:
PURPOSE: To increase the defection sensitivity of a fluctuation constituent and then positively and rapidly detect an individual operation state by detecting that an inverter is in an individual operation state when the amplitude of an amplitude modulation constitution is larger than a reference value.
CONSTITUTION: A signal Sb corresponding to the basic frequency component is taken out of a commercial AC voltage waveform by a band-pass filter processing part 251 in a DSP 25 and is multiplied by an input error signal Sa by a microcomputer 24 a to generate a current command value signal Si. Then, a current error value E which is obtained by multiplying a difference Δi. from an output current value Sc is obtained by an error amplification part 253 and then a pulse width value Pwm is calculated by a PWM operation processing part 254 and is output to a counter circuit. Also, a peak value Vp of each cycle is detected by a peak detection part 255, a plurality of peak values Vp are frequency-analyzed by a frequency analysis part 256 to detect a fluctuation component signal Se and are output to the microcomputer 24, thus increasing detection sensitivity and positively and rapidly detecting an individual operation state.
More Like This:
| JPS59198365 | TROUBLE DETECTOR |
| JPH04248371 | OVERCURRRENT PROTECTOR FOR THREE-PHASE INVERTER |
| WO/2019/020195 | IMPEDOR FOR AC FAULT CURRENT HANDLING IN AN HVDC TRANSMISSION CONVERTER |
Inventors:
Masahiro Makino
Yuji Abe
Masahiko Hashimoto
Masaaki Kohno
Toshiyuki Hirata
Kuniho Tanaka
Yuji Abe
Masahiko Hashimoto
Masaaki Kohno
Toshiyuki Hirata
Kuniho Tanaka
Application Number:
JP15692093A
Publication Date:
October 02, 2001
Filing Date:
June 28, 1993
Export Citation:
Assignee:
Sanyo Electric Co., Ltd.
International Classes:
H02H7/122; H02M7/48; H02M7/493; (IPC1-7): H02M7/48; H02H7/122
Domestic Patent References:
| JP6271428A | ||||
| JP479728A | ||||
| JP6311654A |
Attorney, Agent or Firm:
Yukio Kubo